Learn about mean, median, and mode with Khan Academy's comprehensive review of these fundamental concepts in statistics.

The mean (average) of a data set is found by adding all numbers in the data set and then dividing by the number of values in the set. The median is the middle value when a data set is ordered from least to …

Practice calculating the mean (average) of a data set. The mean gives us a sense of the middle, or center, of the data.

Practice calculating and interpreting the mean and standard deviation of a discrete random variable.

Practice finding the median of a data set. Like the mean, the median gives us a sense of the middle, or center, of the data.

Here we give you a set of numbers and then ask you to find the mean, median, and mode. It's your first opportunity to practice with us!

Calculate the mean, median, or mode of a data set!

Learn how to calculate the mean by walking through some basic examples & trying practice problems.

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Mean and median both try to measure the "central tendency" in a data set. The goal of each is to get an idea of a "typical" value in the data set. The mean is commonly used, but sometimes the median is …